A struggling modern web novelist transmigrates into the One Piece universe as a 10-year-old child. Ryuen lands in Cocoyashi Village wielding the Tori Tori no Mi, a Mythical Zoan-type Bird-Bird Fruit granting phoenix transformation abilities. Following a powerful Nirvana rebirth, Ryuen's devil fruit evolves beyond simple wing manifestation, unlocking devastating new potential. Alongside Nami, Ryuen sets sail across treacherous seas, exploring mysterious islands while savoring adventure and discovery. With a heart devoted to protecting those in need—stealing from the wealthy to aid the impoverished—Ryuen honors the memory of Bellmere's sacrifice, embarking on a journey where friendship, power, and justice intertwine.